Unit for rotary-press reversing bars

ABSTRACT

In a printing press, the reversing bars are each secured at one end to a retaining unit in a manner which permits the selective shifting of the orientation of the bars through an angle of 90*.

United States Patent [72] lnventor Karl A. Klingler Frankenthal, Pfalz.Germany [211 App]. No. 841,929

[22] Filed July 15, 1969 [45] Patented Nov. 30, 1971 [73] AssigneeSchnellpressenfabrik Frankenthal Albert 8:

Cie Frankenthal/Pialz, Germany [32] Priority July 19, 1968 [33] Germany[54] UNIT FOR ROTARY-PRESS REVERSING BARS 1 Claim, 6 Drawing Figs.

[52] U.S.Cl 226/197, 226/199 [5] Int. Cl B65h 23/32 [50] FieldoiSearch226/197, l99. I90; 101/223. 222. 230, 257

[56] References Cited UNITED STATES PATENTS 2.284.3l8 5/1942 Hamlin v 4v 226/!97 X l.374,l96 4/192] Getches... 226/197 X 3.399.884 9/1968Bahrani 226/197 X Primary Examiner- Richard A. Schacher Auomey-AllisonC. Collard ABSTRACT: In a printing press. the reversing bars are eachsecured at one end to a retaining unit in a manner which permits theselective shifting of the orientation of the bars through an angle of90.

PATENTEnunv 30 l97l sum 2 or 3 Inventor K Lin-mum ATTORNEY KAHI,

FATENTEDuuv 30 Ian SHEET 3 0F 3 Fig. 3

Inventor A. KLINCIJ'IH Q mg ATTORNEY This invention relates generally topresses and particularly to a retaining device for the turning orreversing bars of the transverse arms in a rotary press.

Reversing bars are employed in rotary printing presses for the purposeof reversing the direction of the printed sheets, webs of paper, orother materials through an angle of 90. These bars are commonly mountedat an angle of 45 with respect to the direction of travel of the sheets.

In the known rotary presses, these reversing bars are secured by aretaining unit at both ends of the transverse arm. For the purpose ofturning the sheets to the opposite side, the bars must first beunscrewed, and after being displaced through an angle of 90, they mustbe bolted down again. When a number of strips runs into the foldingdevice of the rotary press, structure above the folding apparatus isrequired, which in turn necessitates considerable space and representsan appreciable cost. The changeover of the transverse bar when alteringthe direction of travel of the strip is time consuming and complicated.This also applies to the introduction of sheets when the press is beinginitially set up for production.

It is the object of the invention to provide a retaining unit for aturning bar which is compact in design, and simple to adjust, and whichallows for the ready introduction of strips.

In accord with the invention this becomes feasible owing to the factthat the reversing bars are operatively secured to a transverse arm atonly one end, so that once the retaining parts are loosened, the barsare capable of being reset through an angle 90. A retaining unit isdisposed about the transverse arm and is capable of being shiftedaxially therealong.

The retaining units each include a plate with a cross-slot which ismounted at an angle of 45 with respect to the transverse arm. Thereversing bar is interlocked with the retaining unit by means of asetscrew which is provided at the center of the cross-slot. To reset theposition of the reversing bar of the strips to provide for a change ofdirection, the retaining unit need not be completely loosened. All thatis necessary is to loosen the setscrew, whereupon the reversing bar maybe veered through an angle of 90 about the setscrew. The reversing baris then secured in the new position, in the other arms of the cross-slotby means of the same setscrew. The arrangement of each of the plateswith a cross-slot above and below the transverse arm for theaccommodation of the turning bars prevents collisions between theseveral reversing bars and also prevents the collision of the stripsbetween the bars.

Other objects and features of the present invention will become apparentfrom the following detailed description considered in connection withthe accompanying drawings which disclose one embodiment of the presentinvention. It is to be understood that the drawings are designed for thepurpose of illustration only and not as a definition of the limits ofthe invention.

In the drawings wherein similar reference characters denote similarelements throughout the several views:

FIG. I is a plan view of a series of retaining units and reversing barsin a press illustrating features of the invention.

FIG. 2 is an end view of the apparatus of FIG. 1.

FIG. 3 is a plan view of an enlarged scale of the retaining unit andreversing bar.

FIG. 4 is an elevation view of the retaining unit of FIG. 3.

FIG. 5 is a cross-sectional view taken along FIG. 4, and

FIG. 6 is a schematic paper strip movement diagram for two series ofreversing bars.

In the printing press shown in the drawings, a paper web 3 is passedbetween a pair oflateral supports I and 2. As shown in FIG. 1, web 3 maybe cut as at 4 into eight individual strips 5. A reversing bar 6 isprovided for each individual strip 5. Each reversing bar 6 is mounted atan angle of 45 to the web 3 and the individual strips 5 and serve toturn the strips 5 through an angle of with respect to the direction oftravel. The individual strips 5 which are thus arrayed one above theother are then fed into a folding apparatus over guide rollers (notshown). In the Position of the reversing bars designated by the solidlines in F G. 1, four strips run to the left and four strips run to theright. If all of the eight strips are to run leftward, the reversingbars which are positioned to the right must be shifted into the positionindicated at 6' by the broken lines. Any other positions of thereversing bars may be required, say three strips to the left and fourstrips to the right, with the web being subdivided into seven individualstrips. In this operation one of the reversing bars is standing idle. Inthe example shown in FIG. 1, the length of each reversing bar 6 is sodevised that in lieu of eight such bars, resort may also be had to fourstrips turned to a double width in lieu of the eight strips.

A retaining unit 7 is provided for each reversing bar 6, and isdisplaceably secured on a transverse arm or on a crosspiece 8. Each unit7 is secured against rotation by means of a wedge 17 (FIGS. 2 and 5)which runs through the crosspiece 8. Above and below the crosspiece 8each of the retaining units 7 is provided with a plate 16 (FIG. 5) inwhich a cross-slot 21 is formed. The arms of slot 21 are disposed at anangle of approximately 45 to the crosspiece 8. Fitted into the said slotis a wedge 20 ofa receiving unit 18 (FIG. 4) which is secured by screws19 to the end of each reversing bar 6. Clamped firmly at the center ofthe cross-slot 21 is a setscrew 9 which passes through the receivingunit 18 near the end of the reversing bar. By means of this securing ofthe reversing bar 6 by the retaining unit 7, the bar may be readilypivoted about setscrew 9 through an angle of 90 as illustrated by thebroken line in FIG. 3.

The reversing bars 6 are each individually laterally displaceable to thedirection of travel of the web 3 as may be required when resetting theformat from, say, six to five strips. This is accomplished with the aidof the shafts 10 which are mutually coupled with the aid of spur gearsII, 12 (FIG. 2) and driven jointly via the bevel gear pair 13. Where itis necessary to displace a given reversing bar 6, the respectivecoupling I4 is joined and the adjusting sleeve 15 (FIG. I) rotates alongwith the shaft 10 and displaces the desired retaining unit 7 along withits associated reversing bar 6. The number of shafts 10 is determined bythe number of reversing bars which are to be displaced in this manner.

FIG. 6 shows schematically a lateral view of the reversing bar design inthe case in which presses respectively feeding a web 3 from the rightand left are provided on both sides of the folding apparatus. The web iscut into individual strips between the blades 22 and the blade rollers23.

While only a single embodiment of the present invention has been shownand described, it will be understood that many changes and modificationsmay be made thereto without departing from the spirit and scope of theinvention.

What is claimed is:

I. In a rotary press, having a transverse arm and a reversing bar, meansfor adjustably securing said reversing bar to said transverse bar,comprising;

a plate slidably disposed about said transverse arm having a cross-slotformed therein oriented at an angle of approximately 45 with respect tosaid transverse arm, screw means passing through one end of saidreversing arm and received at substantially the center of saidcross-slot for releasably locking said reversing bar in first and secondpositions with respect to said transverse arm, said second positionbeing displaced through an angle of approximately 90 with respect tosaid first position.

* 0: It a

1. In a rotary press, having a transverse arm and a reversing bar, meansfor adjustably securing said reversing bar to said transverse bar,comprising; a plate slidably disposed about said transverse arm having across-slot formed therein oriented at an angle of approximately 45* withrespect to said transverse arm, screw means passing through one end ofsaid reversing arm and received at substantially the center of saidcross-slot for releasably locking said reversing bar in first and secondpositions with respect to said transverse arm, said second positionbeing displaced through an angle of approximately 90* with respect tosaid first position.